Jean Perier fb3faa8b32 [flang] Do not lose call in shape inquiry on function reference ... Currently, something like `print *, size(foo(n,m))` was rewritten to `print *, size(foo_result_symbol)` when foo result is a non constant shape array. This cannot be processed by lowering or reprocessed by a Fortran compiler since the syntax is wrong (`foo_result_symbol` is unknown on the caller side) and the arguments are lost when they might be required to compute the result shape. It is not possible (and probably not desired) to make GetShape fail in general in such case since returning nullopt seems only expected for scalars or assumed rank (see GetRank usage in lib/Semantics/check-call.cpp), and returning a vector with nullopt extent may trigger some checks to believe they are facing an assumed size (like here in intrinsic argument checks: 196204c72c/flang/lib/Evaluate/intrinsics.cpp (L1530)). Hence, I went for a solution that limits the rewrite change to folding (where the original expression is returned if the shape depends on a non constant shape from a call). I added a non default option to GetShapeHelper that prevents the rewrite of shape inquiry on calls to descriptor inquiries. At first I wanted to avoid touching GetShapeHelper, but it would require to re-implement all its logic to determine if the shape comes from a function call or not (the expression could be `size(1+foo(n,m))`). So added an alternate entry point to GetShapeHelper seemed the cleanest solution to me. Differential Revision: https://reviews.llvm.org/D116933		2022-01-10 19:10:48 +01:00
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flang	[flang] Do not lose call in shape inquiry on function reference	2022-01-10 19:10:48 +01:00
CMakeLists.txt	[flang] A rework of the cmake build components for in and out of tree builds.	2020-03-26 18:17:04 +00:00